CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > ANSYS > FLUENT

about define_diffusivity

Register Blogs Members List Search Today's Posts Mark Forums Read

LinkBack Thread Tools Display Modes
Old   April 7, 2006, 03:53
Default about define_diffusivity
Posts: n/a
I am modeling the transport of multi-conponents along two different zones,and the following code for setting different diffusivities : DEFINE_DIFFUSIVITY(mass_diff, c, t, i) {

if (THREAD_ID(t)==ZONE_1)

D = 12345;

if (THREAD_ID(t)==ZONE_2)

D = 67890;

return D; } then what does the value D stands for,is it the diffusivity for species i in the mixture?if it is the case ,i suppose the Fick's law approximation is adopted by default,how should i set the binary diffusivity with UDF if i want to model in full multicomponent model?

  Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 05:34.